Nose bridge of spectacles



Nov. '29, 1927. 1,651,062

7 0. Juan I NOSE BRIDGE 0F SPECTACLES -F1 1 ed Feb. 11. 1926 .Fnvmtor: 01in Jiich bauras,

1 coated nosebridge and to be enabled to make Patented Nov. 29, 1927.

OTTO J'tl'CH, 0F RATHENOW, GERMANY.

NOSE BRIDGE OF SPECTACLES.

Application filed February 11,1926, Serial No. 87,604, and in Germany March 10, 1925.

When a nosebridge, covered with a small pipe of celluloid, is to be secured to the glass framings by soldering said coating is apt material, while the glass framing-s, which Iv coated for their entire length may consist of base and accordingly much cheaper metal.

The invention now for the production of such nosebridges with celluloid coating makes use of a known method, in which to the glass framing tongues are soldered and the nosebridge is finished by passing a small metal tube, which is already provided, with celluloid coating, over the tongues of the glass framings. However in this known method the celluloid coating extends only over the central part of the nosebridge.

In order to produce now a completely said bridge from base metal, the tongues,

soldered to the glass trainings, are con-- structed according to the present invention in such a manner, that in the finished bridge they fill out the entire length of the same and overlap each other for a part of their own lengths. The two tongues, before being bent in the shape of the nosebridge, are connected with'each by means of a small metal tube, coated with celluloid for its entire length. By the employment of such a very thin small metal tube, as is necessary to avoid a bulky appearance of the nosebridge, the greatest possible rigidity and firmness of the bridge is obtained, as over the entire length of the same the cross sectional area of the metal filling remains equal.

In the accompanying drawing, in which one form of construction of my improved nosebridge is illustrated,

Fi 1 shows the two glass frames, to Whici the tongues are soldered,

Fig. 2 shows the coated small metal tube, which is to be passed over the tongues, I

Fig. 3 is a longitudinal section drawn in a larger scale of the coated and assembled nosebridge before the bending of the same, Fig. 4 is a cross section on line IV-IV of Fig. 1,

Fig. 5 shows in plan view the finished nosebridge with the attached glass frammgs.

To the two glass framings a, which consist of metal and subsequently are to be coated with celluloid, the two tongues 7) are soldered in the known manner. Said tongues are cut out for the half of their length to a degree of half their thickness in such a manner, that the two out out parts I) and. b" will overlap each other, when the bridge is assembled and the resulting metal rod eX- tends over the whole length of the nosebridge. Then the two tongues b are insorted into the bridge tube 0, over which the celluloid coating d has been passed already. hen being inserted the tongues I) overlap each other within the small tube 0 and completely fill out the hollow space of the same, I

so that on the whole length of the tube 0 or of the nosebridge to be formed, the full crosssectional area ofthe metal, which area consists of the cross sectional area of the tongues b and the annular cross sectional area of the tube 0, remains equal. Thereupon the nosebridge is bent and shaped in the usual manner. Thecelluloid coating (Z extends now directly up to the glass framings a and can be connected with the coating of the latter, so that it completely covers the metal parts of the nosebridge, especially at the points of bending Z). The inherent firmness of said coating will add to the rigidity of the bridge.

I claim:

A method for the manufacture of nosebridges for spectacles, consisting in soldering tangs to the glass frames, said tangs being cut out in their ends adapted to overlap one another, in inserting said tangs into a small metal tube with a celluloid coating over all its length, and finally in bending the said tangs together with the metal tube and its coating into the form of the nose bridge so that the metal tube is wholly filled out with the overlapping tangs therein and the nosebridge is celluloid covered tightly unto the glass frames.

In testimony whereof I aflix my signature.

oTTo won. 

